Thanks for posting the requirement over the Freelancer.com & providing opportunity to team like ours to showcase the talent & skills.
We are mainly into .Net, PHP, MVC development have reasonable experience in SharePoint. If you can discuss the requirements with us and provide us the regular flow of SharePoint projects work, then we have a team with whom I can connect you with. That team is specialized in SharePoint development only and have been doing projects for the many clients in the world.
Also, if you would like us to manage the work on your behalf even that we shall be able to do.
Budget/cost/timelines will be based on the project to project and shall change based on requirements and complexities.
Warm Regards,
Subtlelabs Team